Machine tool



Sept, 30 1924..

J. w. BROWN, .IR

MACHINE TOOL Filed May' '7. 1923 3 Sheets-Sheet l i lnlullllllllllof 3 if d W sept. 3o. 1924. 1,510,135

J. W. BROWN, JR

MACHINE TOOL Fi1ed,Ma.v '7. 1923 3 Sheets-Sheet 3 Inventor.

Patented Sept. 30, 1924.

JOHN WILSON BROWN, JR., OF PHILADELPHIA, PENNSYLVANIA.

MACHINE TOOL.

Application led May 7, 1923. Serial No. 637,180.

To all whom t may concern:

Be it known that I, JOHN WILSON BROWN, J r., a citizen of the United States, and resident of the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a .new and useful Machine Tool, of Ywhich the following is a specification..

My invention belongs to that class of ma chine tools in which a series of work-holding devices, each having a tool opposed to it, revolves continuously about an axis, the series of tools moving synchronously about the same axis, the relative position lateral to said axis of each work-holder and its tool remaining unchanged.

The purpose ofmy invention is to provide` such a machine, which will be adapted to perform successive operations on the same piece by transferring the piece from one work-holder to another until finished and which shall be so arranged that there will always be an empty workholder ready to receivev the piece when so transferred. Further to provide a drilling or boring niachine of this class in which the speed of rotation of each spindle is independent of the speed of any other spindle, in which the f feed of any work-holder toward the spindle is independent of the feed of any other worksholder and in which some of the spindlesmay be fed toward their respective work-holders and some of the work-holders may be fed toward their respective spindles. Further to so construct the machine tool that it may be easy of construction, durable and i rapid of operation.

Referring to the drawings; Fig. 1 is a vertical sectional view of my improved machinetool; Fig. 2 is a horizontal sectional view on the plane A-A; Fig. 3 is a like View on `plane BB; Fig. 4 is a like view on plane Ce-); Fig. 5 is a sectional view of the' piece, the successive operations 'on which are shown, for purposes of illustrationas being performed by my improved machine tool. IThis piece requires to be drilled at l with a 3/8" drill, tapped at l with a fg tap, reamed and faced with a compound tool at 2, 3, 4, 5, drilled at 6 with a 55 drill, and threaded at 7 with aV thread 13g" diameter and 12 pitch.

G is an electric motor one end of whose shaft is coupled to shaft 50 which has, at its end, pinion Swhich drives, through gear 9, shaft 10 and bevel pinion 11 the bevel gear 12. To the gear 12 is secured the spur gear 15, which revolves freely on frame 13 whichis secured to carrier 14. To the carrier 14 are secured the brackets 16, 16. Mounted in these brackets are the spindles 17, 17. Running loose on these spindles and meshing with the gear are the pinions 18. Secured to each pinion 18 is a gear 19 which meshes with a gear 2O which issecured to a gear' 21 and with it runs loose on'stud y22. Gear 21 meshes with gear 23 which is secured to spindle 17. The speed of each spindle is fixed by the respective diameters of gears 19, 20, 21 and 23 and is therefore independent of the speed of any other spindle; The other end of the motor shaft is coupled to shaft 24 which carries on its end pinion 25 which drives through gear 26, planetary gearing H,shaft 27 and bevel pinion 28 the bevel gear 29 which is secured to frame 13 which is in its turn secured to carrier 14. By this means carrier 14 is given a constant motion of revolution about the axis ofcolumn O in the direction of the arrow. Secured to carrier 14 are the brackets 31. Mounted on tliebrackets 31, free to slide in the directfon parallel to the axis of 30 are the work tables J1, J2 &c. Mounted on each table is a bracket 32. This can be adjusted in the direction parallel to the axis of 30 by screw 33. Mounted in 32 on shaft 34 is a roller 35. Mounted in bracket 31 is the shaft 36 on which revolves loose the cam '37 upon which the roller rests. integral with cam 37 is spur gear segment 38. Mounted in bracket 31 is a plunger 39 having a rack 4() which meshes with segment 38. 'At the lower end of plunger 39 said plunger carries a roller 41. Column 30 is bolted to base 42. Secured to base 42 is a ring cam 43 upon which the rollers 41 ride. The surface of cam 43, except at depressed portion 51, is a true helix, so that when the carrier 14 is revolving about the axis of the column' at a constant rate of speed the plun gers 39 will rise at a constant rate of speed. Mounted on bracket 16 is a siide 44 which carries a tapping attachment of a weil known type. Mounted. on column 30 is the stationary cam 45 which through roller 46 and stud' 47 causes slide 44 to move vertioally'and so operate the tapping attach' ment. The proper sequence of the opera tions on the iece of work shownis; drilling at l in wor -holder W1.; tapping at l in work-holder W2; reaming Stm in work holder W73; drilling at 6 in work-holder 72; threading in work-holder W5! In this case two series of work-holders of five workholders each are mounted on the tables J1, J2 &e. two series of tools, of ve tools each, are mounted in the spindles, 'each tool being mounted in that spindle which mates with the table which carries its appropriate work-holder. the order in which they resent themselves at any fixed point in their path of revolution. rlhe work-holders are mounted W5 on J1, W4 on J2, W2 on J2, W2 on J4, W1 on J5 W5 on J6, W4L 0n J2, W3 on J2, W2 on J2, W1 on JN. It will be noted that the workholders are presented at any fixed point of the revolution about the axis of the 'column in the order` inverse tothat in which the operations are performed. This is essential to the proper operation of the` machine. Work-holders may be used which are not fixed to the machine.

In operation the tables J1, J2 &c. with their work-holders passv continuously in front of the operator who is located at the i point where the tables are at their lowest oint of vertical travel` As each workl holder'passes him he takes from it the work and places it in the work-holder which` next preceded the work-holder from which he has taken it. In this way there is always a work-holder ready to receive the work and there is no need to lay it aside while a work-holder is emptied as would be the case with anyv other arrangement of workholders. When the piece is transferred from the work-holder for the. first operation said 'work-holder is filled withan entirely fresh piece; similarly, when the piece is taken from the work-holder for the last operation, it is not transferred to another worlcholder but laid aside as finished.

ln the case of the layout shown in d? ig. 3; table J, carrying work-holder W5 reaches the operator with a piece completely finished; this piece he removes and replaces it with the piece resented to him by table J 2 carrying woi'kolder W4; work-holder W2 he fills with the piece presented to him by table J2 carrying work-holder W2; workholder /V, on table J3 he fills with the piece presented to him by table J2 carrying workholder W 2; work-holder W2 on table J2, he fills withthe piece presented to him by table J5 carrying work-holder W1; work-holder Vif, on table J5 he fills with an entirely fresh piece; table Je carrying work-holder W2' presents him with a finished piece which he removes; wonlcholderWV5 on table d, he fills with the piece presented by table J, carrying work-holder W4; work-holder We, tabe d., ne fills with the prien The.`tables are numbered in sented by table J 2 carryinfr work-holder W2; work-holder W2 on table 8 he fills with the piece presented by table Jn carrying work holder W2; work-holder W2 on table J 2 he fills with the piece presented by table Ju, carrying work-holder lVl; work-holder W1 on table J10 he fills with a fresh piece, and so on continuously.

As the table passes from the operator the plunger 39 is raised by cam 43 and in its turn revolves the segment 38 and with it the cani 37. This cam may be of any de sired shape and the feed of each table is therefore independent of the feed of all other tables.

When the table has returned to the operators station it will have been raised and lowered in the manner determined by its cam 37 and the operation for which its workholder and corresponding tool are adapted will have been finished. Worleholders not secured to the tables may be used, in which case the Work-holder is moved from table to tableinstead ofthe work being moved from holder to holder. In this case it is necessary that the work-holder be moved always to the table preceding it in the motion of revolution so that there will always be a table ready `.for its reception. By means of the screw 38 the height of the table at the topmost point of its vertical travel can be adjusted so as to bring the work-holder on any table into proper relation to its tool.

I claim: p

1. A series of tables revolving about an axis, a tool opposed to each table, said tools being adapted to perform successive operations on the same article, the tools bein so arranged that the tool for the succec ing operation precedes in the path of revolution the tool for the preceding operation and means for revolving the tools about said axis in synchronism with the tables.

2. A series of work-holders revolvinfr continuously about an axis, a series of dificrent tools, one tool opposed to each work-holder and moving synchronously with it about the saine axis, successive pairs of tool and Worleholderl being adapted to perform different operations on the saine article.

3. A seriesof worlrholdeis revolving continuously about'an axis, a series of dififerent tools, one tool opposed to each worleholder and moving synchronously with it about the same axis, successive p :is of tool and worli.- holder being adaptA to pe. erin different operations on the saine article, the pair oi' toolend work-holder for the succeeding op eration being that pair which, in thcnietion of revolution, precedes the pair for the preceding oneri-tion.

lili

readies for revolving any spindle at a speed dilierent from the speed of the other spindles of theAseries.

5. A series of Work-holders revolving continuously about an axis, a spindle opposed to 'each work-holder and moving synchronously with it about the same axis and means for changing the relative position, in the direction parallel to the axis of the spindle, of the spindle and Workholder of any pair of spindle and Work-holder at a rate independent of the rate of the like change of position of any other pair.

6. A carrier revolving continuously about an axis, spindles in the carrier, means for driving the spindles, a Work-holder opposed to each spindle and moving with it, a stationary ring cam, a plunger for each Work holder, a rack in said plunger, a gear segment for each plunger and a cam connected to each gear segment.

7. A series of Work-holders revolving about an axis, a stationary cam, a plunger for each Work-holder' and a cam connected to each plunger.

8. A work-holder revolving about an axis, a stationary ring cam about the same axis and a spiral cam Whose acting face comprises spirals of diierent pitches moving With the Work-holder.

9. A Work-holder revolving about an axis, a stationary ring cam about the same axis, a spiral cam Whose acting surface comprises spirals of different pitches moving With the Work-holder and means for actuating the second said cam, by the lirst said cam.`

10. A series of Work-holders revolving about an axis, a spindle opposed to each work-holder and moving synchronously With it about the same axis and means whereby the motion of revolution of said Work-holders and spindles causes, change in the relative position, in the direction parallel to the axis of the spindle, of the spindle and workholder of any pair of spindle and workholder at a rate independent of the rate of a like change or' positionof any other pair.

l1. A Work-holder revolving about an axis a spiral cam Whose acting face comprises spirals of different pitches movingl with the Work-holder and means for revolving the cam about its own axis.

12. A work-holder revolving about an axis, a spiral cam Whose acting face coinprises spirals of diierent pitches moving with the Work-holder and serving to vary the position of the Work-holder in the d`ireo tion parallel to said axis and means for revolving the cam about its own axis.

JOHN W'ILSON BROWN, JR. 

